Help create tracking code for "Aflite"

[FunkyCards]

Hi

I have just signed up to Aflite to try them out for my Affiliate marketing and trying to add there tracking tag onto the receipt page and having some issues with it.

This is the code that I have added on the reciept page

<img src="https://aflite.co.uk/track/goal?mid=32772&goalid=1394&ref=<actinic:variable name="TheOrderNumber" selectable="false" />;&value=NETQUOTEVAR:NUMERICSUBTOTAL" width="1" height="1"/>

I have changed the OrderScript.pl to include the following:

$::s_VariableTable{$::VARPREFIX.'NUMERICSUBTOTAL'} = (($nTotal-$nShipping)-$nTax1)/100;

But I'm still getting a error, any suggestions? I'm on V10.

Cheers

Darren